1. Association for the Advancement of Sustainability in Higher Education (2012a). The STARS program. Retrieved from http://www.aashe.org/files/documents/STARS/stars_overview.pdf
2. Association for the Advancement of Sustainability in Higher Education (2012b). STARS institutions. Retrieved from https://stars.aashe.org/institutions/
3. Association for the Advancement of Sustainability in Higher Education (2012c). STARS institutions. Retrieved from https://stars.aashe.org/institutions/ball-state-university-in/report/2011-08-02/1/3/15/
4. Calder, W., & Dautremont-Smith, J. (2009). Higher education: More and more laboratories for inventing a sustainable future. In J. C. Dernbach (Ed.), Agenda for a sustainable America (pp. 93–107). Washington, DC: Environmental Law Institute.
5. Copernicus Campus (2012). COPERNICUS guidelines for sustainable development in the European higher education area. European Commission. Retrieved from http://www.unece.org/fileadmin/DAM/env/esd/information/COPERNICUS%20Guidelines.pdf